Belimo UK24LON Informacje o produkcie - Strona 7
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Connecting the MP-Bus
The network employs a 3-pole
●
connection (MP communication
and 24 V power supply).
Up to 8 MFT(2)/MP actuators can be
●
connected to each network.
Maximum conductor length for AC 24 V
L = Max. conductor length [m]
Gnd
AC 24 V
AC 24 V
MP
1
2
5
1 5
Actuator
UK24-LON
UK24LON
1
Total power rating of MFT(2)/MP actuators [VA]
Conductor length vs. Sizing rating for
AC power supplies (min. transformer voltage AC 21.6 V)
0.75 mm
1.5 mm
Sizing rating [VA]
In the case of the NVF24-MFT2 the sizing rating
!
must be multiplied by 2.
Calculating maximum conductor lengths
First add together the power ratings [VA] of the MFT(2)/MP actu-
ators that are being used and then read off the corresponding
conductor lengths from the diagram.
Example:
Connected to the MP-Bus are: 1 pce NM24A-MP,
1 pce SM24A-MP, 1 pce LMV-D2-MP... and 1 pce NV24-MFT2
Total power rating:
5.5 VA + 6 VA + 5 VA + 5 VA = 21.5 VA
Read off from the curves:
• Cable with core Ø 0.75 mm
• Cable with core Ø 1.0 mm
• Cable with core Ø 1.5 mm
• Cable with core Ø 2.5 mm
Maximum conductor length with a local AC 24 V power supply (vor Ort)
Note: If the actuators are fed with a local AC 24 V power
supply from a separate transformer it is possible for conductor
lengths to be substantially greater. Regardless of the power
ratings of the actuators connected to the UK24LON unit the
conductor lengths are then as stated in the adjacent table.
No special cable or terminating
●
resistors are needed.
Conductor lengths are limited
●
(see below for methods of calculation)
– by the total power rating of the
MFT(2)/MP actuators that are
connected,
1
2
5
1
Actuator
Actuator
2
2
1.0 mm
2
2
2.5 mm
2
cable length 28 m
gives:
2
gives:
cable length 35 m
2
gives:
cable length 50 m
2
gives:
cable length 90 m
2
MP-Bus conductor lengths
Maximum conductor length for DC 24 V
Gnd
DC 24 V
DC 24 V
MP
2
5
1 5
UK24-LON
UK24LON
8
Total power rating of MFT(2)/MP actuators [W]
Conductor length vs. Active power for
DC power supplies (min. supply voltage DC 24.0 V)
Conductor length vs. Active power for DC power supplies
(min. supply voltage DC 24 V).
Calculating maximum conductor lengths
First add together the power ratings [W] of the MFT(2)/MP actu-
ators that are being used and then read off the corresponding
conductor lengths from the diagram.
Example:
Connected to the MP-Bus are: 1 pce NM24A-MP,
1 pce SM24A-MP, 1 pce LMV-D2-MP... and 1 pce NV24-MFT2
Total power rating:
3.5 W + 4 W + 3 W + 3 W = 13.5 W
Read off from the curves:
• Cable with core Ø 0.75 mm
• Cable with core Ø 1.0 mm
• Cable with core Ø 1.5 mm
• Cable with core Ø 2.5 mm
Core Ø mm
2
0.75
1.0
1.5
2.5
– by the type of power supply (AC 24 V
or DC 24 V via the bus),
– by the cross sectional area
of the conductor.
L = Max. conductor length [m]
L = Max. Kabellänge [m]
1
2
5
1
2
5
Actuator
Antrieb
Actuator
Antrieb
1
2
0.75 mm
2
1.5 mm
2
Active power [W]
cable length 55 m
gives:
2
gives:
cable length 75 m
2
gives:
cable length 110 m
2
cable length 190 m
gives:
2
L = Max. conductor length [m]
800
1
2
5
Actuator
Antrieb
8
1.0 mm
2
2.5 mm
2
7